You don't care about counterfactual preferences, you only care about the bearers of these conterfactual preferences being willing to help you, in exchange for you helping them.

It might well be that prior to the first AGI, the info about the world is too sparse or scrambled to coordinate with counterfactual AGIs, for our AGI to discern what's to be done for the others to improve the possible outcome for itself. Of those possibilities, most may remain averaged out to nothing specific. Only if the possibility of FAI is clear enough, will the trade take form, and sharing common history until recently is a help in getting the clear info.